Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 150 insertions, 0 deletions

diff --git a/source3/smbd/smb2_pipes.c b/source3/smbd/smb2_pipes.c
new file mode 100644
index 0000000..8f87867
--- /dev/null
+++ b/source3/smbd/smb2_pipes.c
@@ -0,0 +1,150 @@
+/*
+   Unix SMB/CIFS implementation.
+   Pipe SMB reply routines
+   Copyright (C) Andrew Tridgell 1992-1998
+   Copyright (C) Luke Kenneth Casson Leighton 1996-1998
+   Copyright (C) Paul Ashton  1997-1998.
+   Copyright (C) Jeremy Allison 2005.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/*
+   This file handles reply_ calls on named pipes that the server
+   makes to handle specific protocols
+*/
+
+
+#include "includes.h"
+#include "smbd/smbd.h"
+#include "smbd/globals.h"
+#include "libcli/security/security.h"
+#include "rpc_server/srv_pipe_hnd.h"
+#include "auth/auth_util.h"
+#include "librpc/rpc/dcerpc_helper.h"
+
+NTSTATUS open_np_file(struct smb_request *smb_req, const char *name,
+		      struct files_struct **pfsp)
+{
+	struct smbXsrv_connection *xconn = smb_req->xconn;
+	struct connection_struct *conn = smb_req->conn;
+	struct files_struct *fsp;
+	struct smb_filename *smb_fname = NULL;
+	struct auth_session_info *session_info = conn->session_info;
+	NTSTATUS status;
+
+	status = file_new(smb_req, conn, &fsp);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(0, ("file_new failed: %s\n", nt_errstr(status)));
+		return status;
+	}
+
+	fsp->conn = conn;
+	fsp_set_fd(fsp, -1);
+	fsp->vuid = smb_req->vuid;
+	fsp->fsp_flags.can_lock = false;
+	fsp->access_mask = FILE_READ_DATA | FILE_WRITE_DATA;
+
+	smb_fname = synthetic_smb_fname(talloc_tos(),
+					name,
+					NULL,
+					NULL,
+					0,
+					0);
+	if (smb_fname == NULL) {
+		file_free(smb_req, fsp);
+		return NT_STATUS_NO_MEMORY;
+	}
+	status = fsp_set_smb_fname(fsp, smb_fname);
+	TALLOC_FREE(smb_fname);
+	if (!NT_STATUS_IS_OK(status)) {
+		file_free(smb_req, fsp);
+		return status;
+	}
+
+	if (smb_req->smb2req != NULL && smb_req->smb2req->was_encrypted) {
+		struct security_token *security_token = NULL;
+		uint16_t dialect = xconn->smb2.server.dialect;
+		uint16_t srv_smb_encrypt = DCERPC_SMB_ENCRYPTION_REQUIRED;
+		uint16_t cipher = xconn->smb2.server.cipher;
+		struct dom_sid smb3_sid = global_sid_Samba_SMB3;
+		size_t num_smb3_sids;
+		bool ok;
+
+		session_info = copy_session_info(fsp, conn->session_info);
+		if (session_info == NULL) {
+			DBG_ERR("Failed to copy session info\n");
+			file_free(smb_req, fsp);
+			return NT_STATUS_NO_MEMORY;
+		}
+		security_token = session_info->security_token;
+
+		/*
+		 * Security check:
+		 *
+		 * Make sure we don't have a SMB3 SID in the security token!
+		 */
+		num_smb3_sids = security_token_count_flag_sids(security_token,
+							       &smb3_sid,
+							       3,
+							       NULL);
+		if (num_smb3_sids != 0) {
+			DBG_ERR("ERROR: %zu SMB3 SIDs have already been "
+				"detected in the security token!\n",
+				num_smb3_sids);
+			file_free(smb_req, fsp);
+			return NT_STATUS_ACCESS_DENIED;
+		}
+
+		ok = sid_append_rid(&smb3_sid, dialect);
+		ok &= sid_append_rid(&smb3_sid, srv_smb_encrypt);
+		ok &= sid_append_rid(&smb3_sid, cipher);
+
+		if (!ok) {
+			DBG_ERR("sid too small\n");
+			file_free(smb_req, fsp);
+			return NT_STATUS_BUFFER_TOO_SMALL;
+		}
+
+		status = add_sid_to_array_unique(security_token,
+						 &smb3_sid,
+						 &security_token->sids,
+						 &security_token->num_sids);
+		if (!NT_STATUS_IS_OK(status)) {
+			DBG_ERR("Failed to add SMB3 SID to security token\n");
+			file_free(smb_req, fsp);
+			return status;
+		}
+
+		fsp->fsp_flags.encryption_required = true;
+	}
+
+	status = np_open(fsp, name,
+			 conn->sconn->remote_address,
+			 conn->sconn->local_address,
+			 session_info,
+			 conn->sconn->ev_ctx,
+			 conn->sconn->msg_ctx,
+			 conn->sconn->dce_ctx,
+			 &fsp->fake_file_handle);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(10, ("np_open(%s) returned %s\n", name,
+			   nt_errstr(status)));
+		file_free(smb_req, fsp);
+		return status;
+	}
+
+	*pfsp = fsp;
+
+	return NT_STATUS_OK;
+}